7 Replies Latest reply: Apr 23, 2013 3:15 AM by Cobalt19
Cobalt19 Level 1 Level 1 (10 points)

Hi. A most frustrating negative occurrence - whenever I try to record high frequencies into an audio track of logic Pro, it ' breaks up' audibly and the programme stutters and sometimes freezes. What is going on? It does not happen at middle or lower frequencies, and I have checked that both the recording channel input level is not overloading nor is the master 'out' of the mixer overloading.

 

What makes this particularly galling is that I just spent a huge whack on a quality Moog synth and now I cannot record it without this issue. Its bad enough that my MacBook Pro (2010 model, 7200rpm hdd & 4Gb memory) often falls over when i have all of two audio tracks and several midi tracks running - but this is different, I have nothing else recorded and no midi tracks running and Logic fails as soon as it hears high frequencies (e,g. Filter resonance sweep).

 

I have a high quality audio interface (RME Fireface 400 firewire) which is exhibiting no problems.

 

Has anyone got any ideas on why this problem is happening, and any remedies?


MacBook Pro, Mac OS X (10.6.8), 2.8Ghz Intel, 4Gb DDR
  • 1. Re: Logic Pro freezes when high frequencies recorded-why?
    Pancenter Level 5 Level 5 (7,640 points)

    Is the filter-resonance sweep manual?

     

    It could be (probably is) something not related to frequency at all..

     

    What model Moog?

  • 2. Re: Logic Pro freezes when high frequencies recorded-why?
    Cobalt19 Level 1 Level 1 (10 points)

    Hi. Yes a manual filter sweep.

     

    No issues when monitoring the Moog (Voyager) filter sweep over headphones (not through Fireface and Logic).

    I have other analogue synthesisers (Korg MS20, Doepfer modular) as well as plenty of software instruments and I have never encountered this problem before, from memory.

     

    I am not convinced its a musical instrument problem (even though I have little evidence other than the above info currently) - is it even possible that an audio interface could fail to cope with such frequencies? It's as if Logic processing is somehow overloaded.

     

    I seem to remember the issue occurs even when Logic is not actually recording but the audio track used for the Moog is armed and ready and only playing (i.e. to give me midi-CV click track via Kenton interface).

  • 3. Re: Logic Pro freezes when high frequencies recorded-why?
    Pancenter Level 5 Level 5 (7,640 points)

    My contention is the Manual Filter Sweep is sending out some kind of MIDI DATA (depending on how it's mapped) and this is in fact what's crashing Logic...

     

    It may not even be MIDI data, just something in manual sweep.

     

    Could be wrong but I would start there.

  • 4. Re: Logic Pro freezes when high frequencies recorded-why?
    Pancenter Level 5 Level 5 (7,640 points)

    The voyager has a Kenton retro-fit kit installed?

  • 5. Re: Logic Pro freezes when high frequencies recorded-why?
    Cobalt19 Level 1 Level 1 (10 points)

    Hi

    The Voyager is a modern instrument (2002-present) with in-built midi BUT I have never connected midi and this issue I have described is arising through the audio path (via L & R audio outs from Moog to audio in's on Fireface) -then to the stereo enabled Logic Pro audio track.

  • 6. Re: Logic Pro freezes when high frequencies recorded-why?
    Pancenter Level 5 Level 5 (7,640 points)

    Sorry, you've never connected MIDI.. yikes.

     

    So ONLY the audio outputs are connected?

    Trying to grasp as I've never heard of a problem remotely close to this.

  • 7. Re: Logic Pro freezes when high frequencies recorded-why?
    Cobalt19 Level 1 Level 1 (10 points)

    Hi   - I know, "no midi" may sound mad but its not that I avoid midi as I do have Logic Instruments playing and the Kenton whacking out an appropriate Gate to drive the external hardware analogue sequencer. I will test the midi out on the Moog shortly.

     

    As to my 'problem' - yes I wish I knew what it was. I suspect the Fireface interface the more I think about it, but I dont know what it could be as it has not been overdriven nor abused in any way at all.If anything its been underused.My Korg MS20 make ssome very intresting 'noises' at high frequency and I don't recall Logic going into a nose dive then. Plain wierd.